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2 years ago

What are typical characteristics of metals

Chemistry

1 answer:

photoshop1234 [79]2 years ago

4 0

Answer:

Metals are lustrous, malleable, ductile, good conductors of heat and electricity. Other properties include: State: Metals are solids at room temperature with the exception of mercury, which is liquid at room temperature (Gallium is liquid on hot days).

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Which of the following objects would float when placed in water? (Note: 1 mL 1 cm+3)*

liraira [26]

Only an apple will float when placed in water.

An object will float in water if its density is less than that of water (1.0 g/mL).

An object will sink in water if its density is greater than that of water.

Thus, solid objects made of gold, iron, or rubber will all sink in water.

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3 years ago

2. Given the unbalanced equation:

zheka24 [161]

2 Na + 2 H2O → 2 NaOH + H2 (balanced equation)
The answer would be 2, since 2 in the coefficient of both Na and NaOH

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2 years ago

Which of these compounds is not a molecule? A) MgO B)SO2 C)CO D) CS2

DerKrebs [107]

A) MgO
Hope that helps

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2 years ago

Na2SO4 How many oxygen stems are?

IgorLugansk [536]

Answer:

Na2SO4 means: two moles sodium (45.98 g), one mole sulfur (32.06 g), and four moles oxygen (64.00 g) combine to form one mole of sodium sulfate (142.04 g).

Explanation:

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2 years ago

Read 2 more answers

A student obtains a mixture of the chlorides of two unknown metals, X and Z. The percent by mass of X and the percent by mass of

Aleksandr-060686 [28]

Answer: The additional information that is helpful in calculating the mole percent of XCl(s) and ZCl(s) is the molar masses of Z and X

Explanation:

To calculate the mole percent of a substance, we use the equation:

$\text{Mole percent of a substance}=\frac{\text{Moles of a substance}}{\text{Total moles}}\times 100$

Mass percent means that the mass of a substance is present in 100 grams of mixture

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

We require the molar masses of Z and X to calculate the mole percent of Z and X respectively

Hence, the additional information that is helpful in calculating the mole percent of XCl(s) and ZCl(s) is the molar masses of Z and X

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2 years ago